/Engine/Plugins/BlueprintFileUtils/Source/BlueprintFileUtils/Public/BlueprintFileUtilsBPLibrary.h
Checks if a file exists
true if Filename exists, false otherwise
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="FileUtils") static bool FileExists ( const [FString](API\Runtime\Core\Containers\FString) & Filename )